Work holder for brush machines



Aug. 14, 1928.

c. JOBS-r WORKHOLDER FOR BRUSH MACHINESv Filed Sept. 2, 1924 3 Sheets-Sheet www /WMM Aug. 14, 1928.

c. .loss-r WORKHOLDER FOR BRUSH MACHINES Filed Sept. 2, 1924 5 Sheets-Sheet 2 akker/"m30 C. JOBST WORKHOLDER FOR BRSH MACHINES Aug. 14, i928. 1,680,520

Filed Sept. 2, 1924 3 Sheets-Sheet 5 Wiz/M Patented Aug. 14, 1928.

UNITED STATESY PATENT OFFICE.

CONRAD JOBST, 0F TOLEDO, OHIO, ASSIGNOR T0 THE TOLEDO AUTOMATICY BRUSH Y MACHINE'COMPANY, OF TOLEDO, OHIO, A COIKEPOIRATIOIYI'` OF OHIO.

`WORK HOLDER FOR BRUSH MACHINES.

Application sied september 2, 1924. serial No. 735,466, lj The invention relates to brush machines of that type in which the bristle tufts aresuccessivcly formed and deposited in previously drilledholes in the brush head and areA secured therein by a staple. The invention has more particular reference tothe means for adapting such machine to the manufacture of a specific type of brushes, viz, rotary brushes having a plurality of Circumfcrential rows of tufts converging towards a common plane.

The invention therefore consists in the construction of the work holding means and the cooperative combination of the same with the tuftsetting and drilling means as hereinafter set forth.

In the drawings:

Figure 1 is a sectional elevation of a brush forming machine to which my improvements are applied F1@ ure 2 is a transverse section thereof;

Figure 3 is a similar view taken on a differentplane, partly in elevation;

Figuret is a cross section through Figure 3 substantially on line 4 4 thereof;

Figure 5 tion of `a is an enlarged sectional elevaportion of Figure l;

Figure is a horizontal section through the product.

F lgure i is a section on the line 7&7 of

Figure 4; Figure 8 is a section on the line 848 of Figure 5.

My improvements are pplicable to any suitable construction of brush machine provided with tuft forming, depositmg and stapling mechanism and which may or may not be associated with the p As specifically shown, my improved drilling mechawork holder is designed to cooperate with the mach ine having associated tuft forming and head drilling mechanisms which operate simultaneously on pairs of heads. Inasmuch, however, as the specic construction of the tufting and drilling mechanism forms no part of the present invention, I have omitted showing the same in detail.

As shown, A is the tuft `depositing nozzle whi ch reciprocates in a horizontal plane,

and B is a vertically reciprocatingr head forming a part of the tuft forming mechanism. The these members is mechanism for reciprocating shown diagrammatically as including a crank shaft C, a pitman connection I) between the crank 4and the nozzle,

a bell crank lever E for actuating the head B and a link F for connecting vsaid bell crank with the pitman D.

The type of brush lto ybe manufactured comprises a cylindrical wooden head G cen-A trally apertured at G and having a pluralityk of rows of tufts G2, G3, G4 and G5 extending outward from the periphery thereof and converging to a` common centralv plane. It is therefore necessary to provide mechanism for drilling the brush heads G with tuft receiving apertures in the desired angular relation and also for lpresenting the drilled head ,in proper registration with the tuft depositing nozzle so aste successively fill the holes with tufts.

To accomplish this purpose a work holder is provided for receiving the previously drilled brush heads, saidfholder being intermittently rotated to pass from tuft to tuft in the same row and being also angularly adjusted to correspond with the varying an- 7 gles of the holes in the different rows. Preferably the same construct-ion of holder is adapted to receive an'undrilled blank and to similarly present the same to an associated drilling mechanism soatthe completion 'of each cycle one blankfor `head will becompletely drilled and a previously drilled head will have been completely tufted.

In detail, H isa rock'fra'me which is mounted in bearings I so that its axis lies in the horizontal plane of the reciprocating nozzle A and at right angles to the direction of reciprocation. This rock frame has a portion H offset from the axis of the frame and connecting the portions within the opposite bearings I. The rock frame also ,has a depending arm NVZ. J and J are rock arms extending from opposite ends of the rock frame Hv and carrying at their free ends bearings K .for rotary work supporting spindles K. These spindles extend in a plane which intersects a perpendicular plane v passing through the axis .Hat a predeter-y mined distance from said axis. Thisdistance issuch that when a 4brush head G is mounted on the spindle K, its periphery will be spaced from the axis H by av distance substantially equal to the length of the bristles. The head G is clamped against the shoulder K2 on the spindle by a thumb screw K:l engaging a threaded end of the spindle, and a dowel K* on said shoulder K2 engaging an aperture in the brush vhead will rotatively position the saine.

VEach of the spindles K is rotatively driven throughithe medium of skew gears L, L', respectively on said spindles and a. transversely extending shaft 112, the latter having a. bearing in the depending arm 72 of the rock frame H. The shaft L2 in turn is ro tatively driven through the medium of skew gearsM, 'MQ shaft N and skewrgears (i), O' from a `Shaft. I), which is coaxial with the frame rI-,I and yrotatable therein. Q, is a ratchet wheel fixed upon the shaft I) and R, R', R233 arepawls engaging said ratchet wheel and mounted `upon the reciprocatory head B. The arrangement is such that each reeiprocation of the head B will rotatethe ratchet wheel Q one or more notches, which through the connecting mechanism describedwill rotate vthe spindles K and the brush heads G mounted thereon. The amount ot rotative advancement of the head in each step corresponds as to the distance between tufts in the brush and as both heads are advanced simultaneously and correspondingly, one is positioned toiboring while the other ispositioned for .the setting of a tutt. The step by step movement may thus continue until a full revolution of each brush head is completed.

In addition to the step by step advancement the spindles of the rolls must be angularly adjusted in passing from one circular row of tufts to another. This is accomplished byr a. rocking of the frame I-I and this in turn by the operation of a cam and cooperating mechanism. AS specifically shown, the `bearings I in which the traine H is journaled are on brackets T extending upward from a table U. The cam S islocated beneaththe table and is actuated in timed relation to the crank shaft C by suitable mecha-nism,.such as the intermittent shafts2 yand worin gearing S3. V is a iod actuated by the cam' S and slidably engaging bearings in the bracket T. W is a laterally Kprojecting armatthe upper end of the rod V, whichis slotted to engage a bearing W secured to the I-rock aim W2 ot the rock frame H by a pin W3. Thus when the parts areproperlytimed, the cam S will periodically raise or lower the rod V to rock the frame H into different angular positions. In eachjposition of adjustment, of said trame a complete revolution of each brush head is etfected byfthestep-by-step mechanism before described so lthat a circular row of holes are boredin one brush head and a circular row of tufts are set inthe other head.

In the complete operation of the machine gearing S,

the brush backs are engaged with the spin dles K', are rotatively positioned thereon by the dowel pins Ki and are clamped by the nuts K3. One ot these blanks, which has not been bored, is in registration with the boring machine (not shown) while the other blank previously bored has been transferred from the boring work holder to the tutt setting work holder. lVhen the machine is started in operation, each reciprocation olf the nozzle A. will deposit a tui't in one ol the holes of the bored blank and during the return stroke of the nozzle the movement ot the headB through the medium ol the pawls will actuate the ratchet wheel Q, revolving the frame I-I and through the train of' counected mechanism, rotatively adjusting each oi the brush heads. Such operation is repeated until the circular row ot tufts has beenplaced, at the completion of which the cam S raises or lowers the iod V to change the angle oi the spindles K. lful'ts are then successively set in a second circular row and so on until all of the rows l'or the heads are completed.

ln the arrangement ot successive rows ot tuits it is usually desirable to stagger the holes. rthis is accomplished by providing a separate pawl 'i'or each row, said pawls Il. R1, R2 and Il being ot different length so as to register dili'erently with the teeth of the ratchet wheel. To adjust the pawls into and out oi engagement with the ratchet wheel. there is preferably provided an intermittently rotated shaft X carrying a series ot cams X for engaging the respective pawls. Each cam has a depressed portion K2 for a port-ion ot its eircimierence and a circular portion X3 Vior the balance. The cams are so arranged on the shaft X that when the portion X of one cam registers with the corresponding pawl the raised portions X of the other cams engage the other pawls and prevent the latter trom engagement with the ratchet wheel Q. The shaft X has mounted thereon a pinion Y, which is in mesh with the segmental gear Y secured to the rock Vframe Il, the arrangement heing such that in different positions of ad justment of said rock frame the cams X will successively engage one ot the pawls and will disengage the remainder thereof. ,hns the amount ot' staggeiing of the holes in diti'erent rows isrgoverned by the relative lengths ot the pawls brought into engagement with the ratchet wheel Q. As

shown in Figures and 8, the pawl R is in engagementwith the ratchet wheel Q because the depressed portion X2 oi the cooperating cam X is in engagen'ient with said pawl R. The other pawls R', R2 and R are all held out ot engaeement with the `ratchet wheel because the respective cams cool'ierating vtherewith have the raised portions Xi engaging the saine. Vilhcn the rock Hifi frame H is oscillated to adjust the Work holder for another' circular row of bristles, the gear segment Y rotates the pinion Y and brings the depressed portion X of another of the cams into engagement kwith its corresponding ratchet paWl and this pawl thereupon engages the ratchet wheel Q, While the remaining paivls are held out of engagement.

The brush, which is the product of the operation just described` will have its bristles conically arranged and converging towards the central plane of rotation as shown in Figure 6.

What I claim as my invention is:

l. In a brush machine, a Work holder mounted for rotative adjustment about transverse axes, means for adjusting said holder step-by-step about one of said axes through a plurality of revolutions, and means operating automaticallybetween successive revolutions in timed relation to said first mentioned means for adjusting said holder step-by-step about the other of said tranverse axes.

2. In a brush machine, the combination with means for performin successive operations upon thework, of a Work holder mounted for rotative adjustment about transverse axes, means actuated intermediate each ope 'ation upon the Work for adjusting said holder step-by-step about one of said axes and continuing through a plurality of revolutions, and means for autommatically adjusting said holder about the other of said transverse axes, one step between each successive revolution of said first-mentioned means. i Y

3. In a brush machine, a Work holder comprising al supporting frame, a rock shaft journaled thereon, a` roc-k arm on said rock shaft, a spindle mounted in said rock arm with its axis transverse to the axis of said shaft and radially spaced therefrom, means for clamping a brush head upon said spindle,

means for performing successive operations upon the brush head reciprocating in a` plane of the axis of said rock shaft, means for rotatively advancing said spindle step-by-step intermediate successive reciprocations of said means for performing operations on the brush head and through a plurality of successive revolutions, and means for rotatively adjusting said roclr shaft step-by-step intermediate successive revolutions.

4. In a brush machine, the combination with a reciprocating means for performing successive operations, of a Work holder comprising a frame, arock shaft journaled therein, a rock arm on said rock shaft, a spindle journaled in said rock arm extending transverse to the axis of said rock shaft and radially spaced therefrom, means for clamping a brush head upon said spindle with its central plane of rotation passing through the` axis of said rock shaft, means for intermittently rotatively advancing said spindle step-by-.step through a plurality of successive revolutions, means for intermit` tently adjusting said roel: shaft step-by-step,

one step between each successive revolution, and means for rotatively adjusting said spindle at the beginning of a revolution whereby the step-by-step movements are offset with relation to those in the preceding revolution.

5. In a brush machine, the combination with a reciprocatory member for performing successive operations on the Work, of a Work holder comprising a frame, a rock shaft journaled therein, a pair of rock arms on said rock shaft, a spindle journaled in each rock arm having its axis transverse to the axis of said shaft and radially spaced therefrom, means for mounting the Work head upon said spindle with its central plane of rotation passing through the axis of said shaft, and means for simultaneously and correspondingly rotatively adjusting said spindles to actuate said Work heads step-by-step through a plurality of successive revolutions, and means for rotatively adjusting said rock shaft step-by-step, one4 step intermediate each successive revolution.

6. In a brush machine, the combination with a reciprocating means for performing successive operations, of a Work holder comprising a frame, a rock shaft journaled therein, a rocker arm on said rock shaft, a spindle journaled in said rocker arm extending transversely to the axis of said rock shaft and radially spaced therefrom, meansV for clamping a brush head upon said spindle With its central plane of rotation passing through the axis of said rock shaft, means for intermittently rotatively advancing said spindle step-by-step comprising a ratchet Wheel concentric with said rock shaft, transmission mechanism between said ratchet Wheel and spindle, a. plurality of paWls mounted on said reciprocating means adapted for alternative engagement with said ratchet Wheel and offset in relation to each other, means for intermittently adjusting said rock shaft step-by-step between successive revolutions of said spindle, and means operated by said adjustment of said rock shaft for successively engaging said pawls with said ratchet Wheel, whereby the stepby-step rotative advancements of said spindle in successive revolutions are offset in relation to each other.

7. In a brush machine, a Work holder mounted for rotation through a complete revolution, a ratchet Wheel connected thereto, a series of ratchet pawls of different lengths engageable with said ratchet Wheel, means for reciprocating said paWls, and means allowing one paWl to engage said ratchet Wheel and preventing engagement of the remaining pawls.

8. In a. brush machine, a work `holder mounted for rotation through :L complete revolution, la ratchetwheel connected thereto, :1 `series of ratchet pawls of dierent 5 lengths engngeable with said ratchet Wheel, means for reciprocating said pawls, means allowing one pnwl to engage said ratchet Wheel and preventing engagement of the remaining pawls, and means for successively en gagging theratehet paWlS with said ratchet 10 wheel after predetermined reciprocations thereof.

In testimony whereof I affix my signature.

CGNRAD JOBST. 

